Signal Crayfish Research Paper

With the environment, as one of the most commonly discussed topics today, invasive species are often included in these discussions. However, many seem to participate in these conversations with limited background on the topic. It seems that non-native species are unfairly given the title of ‘invasive’ for a variety of reasons which I plan to explore. As a starting point, it is important to understand the various titles that are allocated to non-native species that have been introduced into a new ecosystem. Under the umbrella of non-native species, there are multiple classifications given to wildlife found in a region different from where the species originates. The broadest of these classifications is non-native or exotic. Non-native is very much a cut and dried description; the species is found in an area that it is not native to. Beyond non-native is established exotic. A species can be distinguished as established exotic if it is first considered a non-native species, then can establish a breeding population. In short, this means that the species must not only be new to an environment, but can then survive and succeed as a species in that environment. Last, there is invasive. To be considered an invasive species, the species must fit three criteria: one, the species is not native to the environment it is found in. Two, the species has been able to reproduce and has created a viable breeding population in the new environment. And finally, the species has begun to cause

Issue: The environmental issue that I have chosen is the impact that invasive species have on the environment. The impact that invasive species have on the environment is vast, yet little is done about it. This issue is extremely important and will impact the world for generations to come. In this paper, I hope to learn about the effect they have on environment and what we can do about it.

My invasive species that I’m investigating is the American mink it is invasive in England. The American mink came from North America, and got brought to England in 1929 for fur farming.

The removal method of Ringed Crayfish data collection was over a sample site area of 50m2 at Pearson Creek, a stream, containing a density of 5.18 crayfish/m2. The sample site was collected in 5m in width by 10m in height with wet, rocky, and grassy conditions. The data collection incorporated five different samples of the number of crayfish removed from the stream each time (Figure 1). Sample one caught 53 Ringed Crayfish with 0 crayfish caught prior. Sample two caught 37 Ringed Crayfish with 53 crayfish caught prior. Sample three caught 42 Ringed Crayfish with 90 crayfish caught prior. Sample four caught 26 Ringed Crayfish with 132 crayfish caught prior. Sample five caught 18 Ringed Crayfish with 158 crayfish caught prior. What was caught in the previous sample was added into the total amount of crayfish caught prior. A negative linear relationship is displayed by data collected in Figure

Before the crisis of invasive species destroying the environment, it was normal for people to dump invasive species into lakes, streams, and rivers, but in today’s society, releasing and bringing invasive species into the environment has come to a near existent halt.

An invasive species is a plant, fungus, or animal species that is not native to a specific location and one point should be noticed is that invasive species does not have to come from another country. For example, lake trout are native to the Great Lakes, but are considered to be an invasive species in Yellowstone Lake because they compete with native cutthroat trout for habitat. Although there are some invasive species arrive with spread and establish populations, like the native butterflies feed on non-native plants in California, the alien trees help restore abandoned pastures to a condition suitable for native plants in Puerto Rico and even the much-maligned zebra mussel helps filter toxins from great lakes, most policymakers regard invasive

The Lionfish is considered “one of the most aggressively invasive species on the planet”; there were no enemies within the Atlantic as none of the fish in this area had seen a Lionfish before. They wouldn’t realize that the Lionfish was in fact a cold predator, with extremely effective venomous spines, and had no enemies to limit its own population growth. They reproduce year round and fifty thousand eggs are released on a three day interval from mature females. The warm Gulf Stream aided their cause, as it’s water carried their eggs and larvae North, and

As humans began to travel and change the landscape of the lands, the pace of invasions has increased dramatically. The word “invasive species” has a lot of negative connotations. However, invasive plants are actually like native plants, not bad when they are in their native habitat, but it is just when they are in a favorable non-native environment that causes them to become invasive. One and half million of the estimated species ten million species are identified as an invasive species. It is impossible to predict what the consequences of bringing a new

There are invaders coming to homes all over America. They are causing damage to entire ecosystems and they can spread to new areas very rapidly if the issue is not dealt with now. These invaders that are destroying our native plants and ecosystems are known as invasive species.

Have any methods of controlling the introduced species being employed? If so, provide a description of these methods.

Influence on ecosystems range from human causes like the bulldozing of a forest to natural causes like a fire or a flood.  In recent times, the introduction and spread of invasive species has transformed native communities rapidly and, in some cases, created irreversible damages.  In the Earth’s history, changes have often occurred in the ecosystems.  For example, glaciers and the retreat of glaciers cause wide-spread changes.  However, although change is a constant in ecosystems, animals and habitats often cannot adapt to the rapid alterations of non-natural stresses.  Harm to the environment from the introduction of invasive species occurs through changes in the habitat and declines in the native species.  Invasive species

Signal crayfish has become widespread through Europe in the last century due to human activities. Signal crayfish poses a threat for the endemic noble crayfish in most of the European countries as a vector of the crayfish plague and competition. As an invasive species, signal crayfish can alter the energy flow of the ecosystem through the food webs since, as omnivorous, it can feed from several trophic level, modifying the ecosystem assemblage. On the other hand, the noble crayfish is endangered due to several factors like water pollution, ecosystem alteration and crayfish plague; consequently, their restauration may be not possible. Therefore, this review aims to compile the effects of the invasive signal crayfish in European freshwater

The biodiversity effects of non-native invasive species have been described as “immense, insidious and usually irreversible” (Veitch and Clout, 2002). There is significant evidence proving that invasive species can cause severe economic, environmental and ecological damage (Mack et al., 2000). A lot of time and research has been devoted to dividing the world into regions with distinctive habitats and species. Numerous pathways, mostly anthropogenic, are breaking down these realms and facilitating the ecological and biological invasion of non-native species.

Eradication, containment, control and mitigation are the four main strategies for dealing with established invasive species (Wittenberg & Cock, 2001). The options for each management strategy are varied based on the complexity of ecosystems, species richness, and climatic regions involved (Huston, 2004). During the implement of management programme, it is important to simultaneously monitor the impact of the actions, as some native species can also be affected by newly disturbances, the monitoring can identify negative unexpected results and allow us to change and adapt the programme to new approaches and situations (Huston, 2004; Wittenberg & Cock, 2001).

Invasive plant species are a cause of great concern in many countries of the world due to their impact on the environment, the economy and on human health. The movement of these plants across borders have been facilitated by global trade and travel. Invasive alien species are non-native plants that are introduced in new areas causing drastic changes to the natural habitats, thus threatening the indigenous plant species and impact local biodiversity. Although the term invasive is difficult to define, plants that generally cause no-harm to the environment or human health are generally not considered invasive. Many, however, argue that movement of plants across boundaries are natural process that have been going on for millennia and continue today for agricultural, ornamental or recreational purposes. Invasive alien plants have provided invaluable contribution to taxonomists and plant vegetation specialists as to the means by which plants colonize new habitats and how they interact with native plants and establish communities within an ecosystem. This review offers insight into the two sides of the invasive plant positions and how to manage the threat and impact of new plant introductions. Actions taken to tackle invasive species around the world will be discussed to determine how to assess their negative impact on the environment, the economy and human health.